2GIG does not offer any official compatibility list that I am aware of. Alarm.com has an officially supported devices page, which can be found here.
We generally recommend the IQ Panel over the 2GIG options, and you can find a 345Mhz version compatible with existing 345Mhz 2GIG sensors here.
Qolsys maintains compatibility lists:
https://suretyhome.com/wp-content/uploads/Supported-Z-Wave-Devices-4.0.0.pdf